Seriously, do i need to say more. Great storytelling used to advance some really big scientific education. I love the contrast of the really high end digital animation vs. all the historic info done in a much more basic animation, almost paper-cut style. The only thing i have to complain about is Neil deGrasse Tyson's "space ship of the mind". Of all the cool looking things they could have done, they just didn't wow me. In fact, it actually takes away from the show because everytime i see it, i find myself asking "why?".
Also, check out Neil's podcast Startalk Radio. Well worth it.